Solutions by everydaycalculation.com
1st number: 10/15, 2nd number: 1 2/6
1015 - 86 is -23.
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Related: 20/15-8/6 10/15-16/6 10/30-8/6 10/15-8/12 30/15-8/6 10/15-24/6 10/45-8/6 10/15-8/18 50/15-8/6 10/15-40/6 10/75-8/6 10/15-8/30 70/15-8/6 10/15-56/6 10/15-8/42
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